低
=
亻
+
氐
:
Dorothy Gale (di) and Rosa Luxemburg (亻) are in a hopeless situation. They are hanging down (低) from a foundation (氐) floating in front of the space station (Ø1) and away from it. In this hopeless situation their moods are very low (低) and they let their heads hang down (低).
沉
=
冗
+
氵
:
Charlie Chaplin is experimenting with superfluous liquid helium and a bottle of water just inside the encampment's kitchen. He lets the water flow into the liquid helium, and because the water is frozen instantly, it sinks and submerges.